VO2max and performance acting strangely

I just did my first ever recovery run. In fact it was the first run I've done where I targeted low aerobic activity, I've owned a Garmin for 4 months.

Here's the weird thing, while doing my recovery run (which might still have been a little fast as Fenix 6 tells me I targeted base not recovery) my performance came up as -5 fair. That's the lowest I've ever seen it, it's nearly always positive. Then my VO2max dropped when I finished and my status changed from "Productive" to "Overreaching". It's nearly always been "Productive" and has never been "Overreaching" before.

Why did this slow run have this effect? I know it's a bit precious but I'd almost made the superior VO2max bracket and one slow run brought it down.

What gives?

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  • You are bound to eventually reach your potential and plateau. Sooner or later. Having said that, although the algorithm for vo2max is usually dead on according to my lab tests, under certain conditions it could be misleading (ie many trail runs, windy days that force slower pace etc). Ultra running is mainly trail running which is excluded from vo2max calculations

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  • You are bound to eventually reach your potential and plateau. Sooner or later. Having said that, although the algorithm for vo2max is usually dead on according to my lab tests, under certain conditions it could be misleading (ie many trail runs, windy days that force slower pace etc). Ultra running is mainly trail running which is excluded from vo2max calculations

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